What Documents Do I Need to File My Taxes in Bangladesh?

Filing an income tax return in Bangladesh is the annual process of declaring your income, expenses, assets, and liabilities to the National Board of Revenue (NBR), so that your tax liability for the relevant tax year can be assessed and settled. The specific documents required depend on whether you are a salaried employee, a business owner, a professional, a landlord earning rental income, or a non-resident Bangladeshi (NRB). At minimum, nearly every individual taxpayer needs an e-TIN certificate, a valid National ID or passport, proof of income for the year, bank statements, and details of assets and liabilities to complete the mandatory wealth statement (Form IT-10B or IT-10BB, depending on the taxpayer category).

Bangladesh's tax framework changed materially with the enactment of the Income Tax Act, 2023, which replaced the earlier Income Tax Ordinance, 1984. Under the new Act, the historical terms "Assessment Year" and "Income Year" have been consolidated into a single concept called the Tax Year. For most individual taxpayers, the Tax Year runs from 1 July to 30 June, meaning "Tax Year 2026-27" refers to income earned between 1 July 2026 and 30 June 2027, which must ordinarily be declared and filed by 30 November 2027 — the statutory "Tax Day" under Section 2(60) read with the return-filing provisions of the Act. Some taxpayers, particularly companies with different accounting closes, may follow an alternative income year approved by NBR.

Because Bangladesh's return-filing system (both the paper-based process at circle tax offices and the NBR's e-Return portal at etaxnbr.gov.bd) requires supporting documents to substantiate income, expense, and asset declarations, gathering the right paperwork before you start is the single most effective way to avoid delays, notices, or an inaccurate return. This guide sets out, category by category, exactly what documents Bangladeshi individual taxpayers need to prepare for Tax Year 2026-27, how to obtain them, and how Aeenx can help you file correctly and on time.

Regardless of your income source, the following documents form the baseline requirement for filing a tax return with the NBR. Think of this as your starting checklist before you move on to category-specific documents.

1. e-TIN Certificate — your 12-digit Taxpayer Identification Number certificate issued by NBR, downloadable from the e-TIN portal.
2. National ID (NID) or Passport — used to verify your identity and match your e-TIN registration details.
3. Previous year's tax return and acknowledgement receipt — if you filed last year, this provides continuity for your opening asset and liability figures.
4. Proof of income — salary certificate, business income statement, professional fee records, or rental income documents, depending on your source of income.
5. Bank statements for all accounts held during the tax year, covering 1 July to 30 June.
6. Investment and rebate documents — DPS certificates, savings certificate (Sanchayapatra) statements, life insurance premium receipts, and any other tax-rebate-eligible investment proof.
7. Asset and liability details — for completing the mandatory wealth statement, including property documents, vehicle registration, and loan statements.
8. Advance tax and TDS certificates — proof of tax deducted at source (TDS) by your employer, bank, or clients, and any advance income tax (AIT) paid during the year.
9. Zakat fund receipts, if claiming a zakat-related exemption or deduction.
10. Proof of tax-exempt income, such as agricultural income certificates or foreign remittance documents, where applicable.

Not every taxpayer needs every item on this list. A salaried employee with no investments beyond a provident fund will need a much shorter document set than a business owner with multiple income streams. The following sections break down exactly what applies to your situation.

Before you can file any return, you must first hold a valid e-TIN (electronic Taxpayer Identification Number), issued by the NBR under the Income Tax Act, 2023. If you don't already have one, registration is done entirely online through the NBR's TIN registration portal, and no paper documents are submitted at that stage — only scanned or entered details.

Documents needed to register for a new e-TIN

• National ID (NID) number — mandatory for Bangladeshi citizens; the system verifies your NID details against the Election Commission database.
• Valid mobile number registered in your name, for OTP verification during registration.
• Valid email address, used for all future NBR correspondence including e-Return login credentials.
• Employer's TIN and business details, if you are registering as a salaried employee (your employer's TIN is required in the "nature of income" section).
• Business name, trade license number, and address, if you are registering as a business owner or self-employed professional.
• Passport copy, for foreign nationals or NRBs who do not hold a Bangladeshi NID.

Documents needed if you already have a TIN

If you registered previously, you do not need to re-register. You simply need your existing 12-digit TIN number and the login credentials for the NBR e-Return system (etaxnbr.gov.bd) to proceed with return filing. If you have forgotten your TIN certificate, you can retrieve and re-download it from the same portal using your registered mobile number or NID.

It's worth noting that having a TIN does not automatically mean you must file a return every year — but certain categories of TIN holders are required to file regardless of income level, which we cover in the "Who Must File" section below. If you need assistance registering for a TIN correctly the first time, or verifying an existing registration, Aeenx can guide you through the process.

Salaried employees make up the largest single category of individual taxpayers in Bangladesh. If your only income is from employment, the documentation required is generally the most straightforward of any taxpayer category.

1. Salary certificate from your employer, showing gross salary, basic pay, house rent allowance, medical allowance, conveyance, bonus, and any other components paid during the tax year.
2. Form 16 / Statement of Tax Deducted at Source, issued by your employer under Section 108 of the Income Tax Act, 2023, confirming the tax withheld from your monthly salary and deposited with NBR on your behalf.
3. Provident fund (PF) statement, if you contribute to a recognized provident fund — both your contribution and your employer's matching contribution may have tax implications and rebate eligibility.
4. Bonus and incentive payment slips, if paid separately from your monthly salary certificate.
5. Bank statement for the account into which your salary is credited, covering July to June of the relevant tax year.
6. Investment proof for tax rebate — DPS, life insurance premiums, or savings certificates purchased during the year, since salaried individuals commonly claim rebates under this route.
7. House rent receipts, if you wish to declare rental expenditure for house rent allowance exemption calculations.
8. Previous year's return copy, for continuity of your wealth statement.

Many salaried taxpayers in Bangladesh have a single employer and minimal additional income, which makes their return relatively simple to prepare once the salary certificate and TDS statement are in hand. However, if you changed jobs during the tax year, you will need salary certificates and TDS statements from each employer you worked for between July and June, as income and tax deducted must be aggregated across all sources.

Business owners, sole proprietors, freelancers, and self-employed professionals such as doctors, lawyers, and consultants face a more detailed documentation requirement, since their return must reflect actual business income and allowable expenses rather than a fixed salary figure.

1. Trade license copy, current and valid for the tax year.
2. Business bank account statements for the full tax year, covering all accounts used for business transactions.
3. Books of accounts — cash book, ledger, and journal, or at minimum a structured income-expense statement, particularly important since the Income Tax Act, 2023 requires certain categories of taxpayers to maintain and be able to produce accounting records on request.
4. Sales and purchase invoices for the year, supporting your declared turnover and cost of goods.
5. VAT registration certificate (BIN) and VAT return copies, if VAT-registered, as these cross-reference your declared turnover.
6. Audited financial statements (balance sheet, profit and loss account), if your business turnover exceeds the threshold requiring a chartered accountant's audit, or if you are filing as a partnership or company.
7. TDS/AIT certificates for tax deducted by clients or withheld at source on business receipts.
8. Loan statements, if the business has taken any bank loan, showing the outstanding balance as of 30 June.
9. Fixed asset register or purchase receipts for business assets such as vehicles, machinery, or office equipment, needed for depreciation claims and the wealth statement.
10. Rent agreement for business premises, if applicable, to support rent expense claims.

Business income assessment in Bangladesh can follow either the "actual" method (based on properly maintained books of accounts) or, for smaller businesses, a presumptive or simplified approach depending on turnover thresholds set by NBR. If you are uncertain which method applies to your business, or if your books need to be organized before filing, Aeenx's tax advisory team can assess your situation and prepare a compliant return.

One of the most valuable — and commonly under-utilised — parts of an individual tax return is the investment tax rebate, which reduces your final tax liability based on qualifying investments made during the tax year. To claim this rebate correctly, you need documentary proof for each investment category you're declaring.

• Life insurance premium receipts — official receipts from the insurer showing premiums paid during the tax year.
• Deposit Pension Scheme (DPS) certificates — bank-issued statements confirming your monthly DPS contributions.
• Sanchayapatra (savings certificate) purchase receipts — issued by the Bangladesh Post Office or scheduled banks at the time of purchase.
• Provident fund and Recognized/Approved Superannuation Fund contribution statements, where applicable.
• Mutual fund and listed share purchase documents — brokerage statements evidencing the purchase of units or shares eligible for rebate under the applicable schedule of the Income Tax Act, 2023.
• Zakat payment receipts, from a recognized zakat fund, if claimed.
• Donation receipts to government-approved charitable institutions, where the donation qualifies for tax credit.

The rebate is calculated as a percentage of the lower of your total qualifying investment, a fixed cap, or a percentage of your total taxable income — the exact computation should be verified against the current NBR schedule for the tax year in question, since rates and caps have periodically changed with each Finance Act. Because the rebate directly reduces your tax payable (rather than merely reducing taxable income), collecting and organizing this proof properly can meaningfully lower your final liability. If you are unsure which of your investments qualify, consult a lawyer or contact Aeenx before finalizing your return.

Most individual taxpayers in Bangladesh — particularly those with total assets above a threshold set annually by NBR, or those required to file regardless of income — must submit a statement of assets, liabilities, and expenses (commonly known as the wealth statement, filed on Form IT-10B or the simplified IT-10BB for eligible smaller taxpayers) alongside the main return. This statement requires supporting documents for every material asset and liability you hold.

1. Property ownership documents — deed of ownership, mutation certificate, or purchase agreement for any land, flat, or house owned.
2. Vehicle registration certificate, for any car, motorcycle, or other registered vehicle owned.
3. Bank and savings account statements showing closing balances as of 30 June for all accounts.
4. Fixed deposit receipts (FDR) and other term deposit certificates, showing balances at year-end.
5. Share and mutual fund holding statements (CDBL BO account statement) reflecting your portfolio value.
6. Gold and jewellery valuation (self-declared, based on quantity and approximate value), where material.
7. Loan and liability statements — outstanding balances on any bank loan, personal loan, or credit facility as of 30 June.
8. Life insurance policy surrender value statements, if declaring insurance policies as an asset.
9. Business capital account statement, if you have proprietorship or partnership business capital to declare.

The wealth statement is cross-checked year over year: your opening wealth for the current tax year should reconcile with your closing wealth from the previous year's return, adjusted for the year's income, expenses, and any gifts or inheritances received. Discrepancies between reported income and asset growth are one of the most common triggers for NBR scrutiny, which is why maintaining accurate supporting documents for every asset and liability is essential, not optional.

Bank documents serve two purposes in a Bangladeshi tax return: they substantiate your declared income and bank balances, and they provide evidence of interest income, TDS on interest, and any bank charges relevant to your computation.

• Bank statements for all accounts — savings, current, and any joint accounts — for the period 1 July to 30 June.
• Interest certificate / TDS certificate on savings account interest, issued by the bank, showing gross interest earned and tax deducted at source.
• Fixed deposit (FDR) interest certificates, similarly showing gross interest and TDS.
• Credit card statements, if relevant to reconciling expenses against declared income.
• Loan sanction letter and repayment schedule, for any housing loan, car loan, or personal loan, both to declare the liability and, where applicable, to claim interest deduction.
• Foreign currency account statements, for NRBs or individuals holding foreign currency accounts in Bangladesh.

Bank interest is taxable income in Bangladesh and is typically subject to TDS at source by the bank before crediting your account. The TDS certificate is important because it allows you to claim credit for tax already deducted, preventing double taxation on the same interest income when your final liability is computed. Keeping a full set of statements — rather than relying on memory or partial records — significantly reduces the risk of under-reporting or over-reporting income.

If you earn rental income from a house, flat, or commercial space, this income must be declared separately under "income from house property," and requires its own supporting documents distinct from salary or business income.

• Tenancy agreement(s) with each tenant, showing agreed monthly rent.
• Rent receipts or bank transaction records evidencing rent actually received during the tax year.
• Municipal tax and city corporation holding tax payment receipts, which are deductible in computing house property income.
• Property insurance premium receipts, if the property is insured and the premium is being claimed as a deduction.
• Loan interest certificate, if the property was purchased or constructed with a bank loan and you are claiming interest deduction.
• Repair and maintenance expense records, since a statutory repair allowance (rather than actual repair cost) typically applies under the Income Tax Act, 2023, but supporting records help substantiate the property's condition and use.
• Property ownership documents — deed, mutation certificate, and holding number — confirming your legal right to the rental income declared.

Landlords with multiple rental properties should prepare a property-by-property breakdown, since deductions such as municipal tax and loan interest are computed per property before being aggregated into total house property income. Where a property is jointly owned, income should be apportioned between co-owners in line with their ownership share, each declaring their own portion on their individual return.

Non-Resident Bangladeshis (NRBs) and residents with foreign-sourced income face additional documentation requirements, primarily to establish residency status and to substantiate remittances or foreign income declared (or exempted) in the return. According to Wikipedia's general overview of non-resident tax status concepts, most countries apply distinct rules to residents versus non-residents, and Bangladesh is no exception under its own residency tests.

• Passport copy with entry/exit stamps, used to establish the number of days spent in Bangladesh during the tax year, which determines resident versus non-resident tax status.
• Foreign employment contract or salary certificate, for income earned abroad.
• Remittance certificates from the receiving bank in Bangladesh, confirming inward foreign remittances, which are generally exempt from tax when routed through proper banking channels.
• Foreign bank account statements, where foreign assets or income need to be disclosed.
• Foreign tax payment certificates, if you wish to claim relief for taxes already paid abroad on the same income under any applicable double taxation avoidance arrangement.
• NRB Taxpayer Identification proof, if registered under the NRB TIN category.

Determining residency status correctly is critical because it changes both the scope of taxable income (residents are generally taxed on worldwide income, while non-residents are taxed only on Bangladesh-sourced income) and the applicable tax rates and slabs. NRBs planning to invest, purchase property, or set up a business in Bangladesh should also review related compliance requirements, including any relevant BIDA or Bangladesh Bank formalities. For guidance specific to your residency and income situation, reach out to Aeenx's advisory team.

Filing a tax return is mandatory for a broad range of individuals in Bangladesh, not only those whose income exceeds the basic tax-free threshold. Under the Income Tax Act, 2023, certain categories of TIN holders must file a return every year regardless of their income level, because holding a TIN itself triggers specific compliance obligations tied to services such as bank loans, trade licenses, vehicle registration, property registration, and government tenders.

Categories generally required to file, regardless of income

• All individuals whose total income during the tax year exceeds the basic tax-free threshold set for that year.
• Any person who held a TIN in a previous year and does not fall under a specific NBR exemption.
• Owners of a motor vehicle registered in their name.
• Members of a Chamber of Commerce and Industry or trade association.
• Directors or shareholders of a company registered with the RJSC.
• Individuals who have obtained or renewed a trade license within a city corporation or paurashava area.
• Candidates for local government or national elections.
• Individuals applying for a credit card, or availing a loan above a specified threshold from a bank or financial institution.
• Employees of the government, autonomous bodies, or private companies above a specified pay grade.

Because the list of mandatory categories is periodically revised through the annual Finance Act, and because the consequences of missing a mandatory filing include denial of certain government and banking services, it is prudent for any TIN holder to assume filing is required unless they have specifically confirmed an exemption applies to them. If you are unsure whether you fall under a mandatory filing category, consult a lawyer or a qualified tax advisor before the filing deadline.

Under the Income Tax Act, 2023, the statutory filing deadline is referred to as "Tax Day." For individual taxpayers following the standard Tax Year of 1 July to 30 June, Tax Day generally falls on 30 November following the end of the relevant Tax Year — for example, the return covering income earned during Tax Year 2025-26 (1 July 2025 to 30 June 2026) is due by 30 November 2026, and the return for Tax Year 2026-27 (1 July 2026 to 30 June 2027) would similarly fall due by 30 November 2027.

Tax Year	Income Period	Tax Day (Filing Deadline)
2025-26	1 July 2025 – 30 June 2026	30 November 2026*
2026-27	1 July 2026 – 30 June 2027	30 November 2027*

*NBR has discretion to extend Tax Day by notification, and specific taxpayer categories such as companies with a non-standard accounting year may have a different due date. Always verify the current year's exact deadline on the official NBR website before filing.

NBR may grant a time extension upon written application, typically up to two months from the original Tax Day, though extensions are not automatic and must be formally requested with justification before the original deadline passes. Filing after Tax Day without an approved extension exposes the taxpayer to penalties and interest, discussed in the next section.

Missing the Tax Day deadline in Bangladesh carries both financial and practical consequences. Under the Income Tax Act, 2023, the tax authority can impose a penalty for failure to file a return within the due date, in addition to charging interest on any unpaid tax liability for the period of delay.

• Monetary penalty — NBR may impose a penalty, commonly calculated with reference to the tax payable or a fixed amount per NBR's applicable schedule, for late or non-filing.
• Interest on unpaid tax — simple interest accrues on any tax due but unpaid from the original Tax Day until the date of actual payment.
• Loss of access to services requiring a TIN certificate — many banks, government offices, and licensing authorities require an up-to-date return acknowledgement (not just a TIN certificate) before processing loans, renewals, or applications.
• Risk of best-judgment assessment — if a mandatory filer fails to submit a return even after notice, the tax authority may proceed to assess tax liability based on its own judgment, which can result in a higher assessed liability than a self-prepared, properly documented return would have produced.

If you have missed a previous year's filing, it is generally still possible to file a belated return, subject to applicable penalties, and doing so voluntarily is almost always preferable to waiting for an NBR notice. If you are behind on filings, consult a lawyer or tax advisor promptly to understand your specific exposure and the best path to becoming compliant.

1. Confirm or register your e-TIN on the NBR e-TIN portal, and note down your 12-digit TIN.
2. Gather category-specific documents from the checklists above, based on whether your income is salaried, business, rental, or a combination.
3. Reconcile your bank statements against declared income to confirm all receipts are accounted for and correctly categorized.
4. Compute total income across all heads (salary, business, house property, capital gains, other sources), applying allowable exemptions and deductions.
5. Calculate investment tax rebate using your collected DPS, insurance, and savings certificate documents.
6. Prepare the wealth statement (IT-10B/IT-10BB), reconciling opening and closing assets and liabilities using your property, bank, and loan documents.
7. Log in to the NBR e-Return system (etaxnbr.gov.bd) using your TIN and password, or visit your relevant tax circle office for manual filing.
8. Enter all figures and upload supporting documents where the online system requests attachments.
9. Pay any balance tax due through the integrated online payment gateway, bank challan, or authorized payment method, before submitting.
10. Submit the return and download the acknowledgement receipt, which serves as proof of filing for banking, licensing, and other purposes.

The NBR's e-Return system has progressively expanded since its introduction, and online filing is now mandatory for several categories of taxpayers, with government policy moving steadily toward full digital filing. Regardless of whether you file online or on paper, retaining copies of every submitted document for at least six years is advisable, since NBR retains the right to reopen assessments within statutory time limits.

• Missing salary certificates from a previous employer after a mid-year job change, leading to under-declared income.
• Failing to collect TDS certificates from banks, employers, or clients, resulting in lost credit for tax already deducted.
• Inconsistent asset figures between the current year's wealth statement and the previous year's closing balances, which is one of the most common triggers for an NBR query.
• Overlooking rental income from a secondary property, especially where rent is received informally or in cash.
• Not keeping investment receipts for DPS, insurance, or savings certificates, forfeiting a legitimate tax rebate.
• Using outdated NID or address details that don't match TIN registration records, causing system mismatches during e-Return submission.
• Waiting until the last week before Tax Day to start gathering documents, leaving no time to request duplicate certificates from banks or employers if originals are missing.

Most of these issues are entirely preventable with early preparation. Starting your document collection at least four to six weeks before Tax Day gives you enough time to request replacement certificates, reconcile discrepancies, and file an accurate, complete return the first time.

Preparing a fully documented, accurate tax return under the Income Tax Act, 2023 requires more than filling in numbers — it requires organizing the right evidence for every income head, exemption, and rebate you intend to claim. At Aeenx, we help individual taxpayers, business owners, and NRBs across Bangladesh gather the correct documents, reconcile their wealth statement, calculate applicable rebates accurately, and file returns through the NBR's e-Return system well before Tax Day.

Our services include pre-filing document checklists tailored to your income category, review of salary certificates and TDS statements for accuracy, wealth statement preparation and reconciliation, investment rebate optimization, and end-to-end e-Return submission support. Whether you are filing for the first time or catching up on a missed year, our team can help you avoid the common mistakes outlined above.

Further Reading

• Income Tax — Wikipedia
• Taxpayer Identification Number — Wikipedia
• National Board of Revenue — Wikipedia
• Tax Deduction at Source — Wikipedia
• Bangladesh — Wikipedia